Ars est celare artem. -- 'Ars Amatoria', Ovid. Despite having done Latin for 6 years in school, I (ahem . . ) am not sure if the C in celare is pronounced as an Italian 'soft C', (which sounds like an English 'ch') or as an English soft C (which is the same as an English 's') . . . My feeling is that it is the former.